Improvement in apparatus for laying cement pavement in blocks



2 Sheets-Sheet I. l. B. HURLBUT.

Apparatus for Laying Cement Pavement in Blocks. No 162172 Pa1entedAprH20,1875.

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@ A fh uenzoir THE GRAPHIC COJHOTOr-LITH-SQEM PARK PLACE,N.Y-

2 Sheets--Sheet 2.

1. B. HURLBUT. Apparatus for Laying Cement Pavement in Bincks.

' Patented April20,l875.

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"(H E GRAPHIC C0.PHOT0-LITH.39&4 1 PARK PLACLNAL @rrrca.

J. BURRELL HUBLBUI, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF HIS RIGHTTO WILLIAM I. DICKINSON, OF SAME PLACE.

IMPROVEMENT IN APPARATUS FOR LAYING CEMENT PAVEMENT IN BLOCKS.

Specification forming part of Letters Patent No. 162,H72, dated April20, 1875; application filed November 21, 1874.

To all whom it may concern:

Be it known that I, J. BURRELL HURL- BUT, of Chicago, Illinois, haveinvented certain Improvements in Cement Pavement and the Apparatus forMaking the Same, of which the following is a specification:

My invention relates to a novel method of forming blocks of artificialstone or cement pavement, whereby they are prevented from becominguneven by sinking below or rising above a common plane upon their uppersurface by the action of frost or other cause; and consists in bevelingthe edges of the blocks, so that they will measure more across theirupper side than across their under side in one direction, and lessacross their upper side than across their under side in the other oropposite direction; and also in the novel construction of aforming-frame, whereby the blocks are beveled, as desired, by using thedifi'erent sides of the frame alternately; and

also in the novel construction of a partingstrip, whereby the colors arekept separate showing a straight line between the blocks,

and while forming their edges in actual contact, the same strip being ofgreat service to rest a straight-edge upon while leveling the block inprocess of formation, all of which is hereinafter more fully described.

In the accompanying drawings, Figure 1 represents my forming-frame, madeof wood or other suitable material, consisting of a series of pieceswith parallel edges, connected together at their ends, forming thedesired angles 0, with two faces converging together, alike upon bothsides, the whole forming a solid frame, with both edges of all itspieces beveled in the same direction, as seen at d and dotted lines a.Fig. 2 is a cross-section of the forming-frame, Fig. l, and more fullyshows the bevel of its edges.

The forming-frame, Fig. 1, is made with the edges of its piecesparallel, and beveled alike and in the same direction, so that it may bereversed to form the desired bevel upon the edges of the differentseries of blocks by turning the edge first used outward, and using theother edge in forming the second series of blocks, as seen in Figs. 6and 7.

Fig. 4 is a perspective view of the pieces used to part the colors andform a straight line between the different series of blocks, and also torest a straightedge upon while sweeping the blocks in process offormation to the desired level, and is made of wood or other suitablematerial, about four inches in width and three-fourths of an inch inthickness, having a depression cut into its under side, at f, to receivethe upper side of the strip g, which is the same width as the wood, andabout oneeighth of an inch in thickness, and is made of india-rubber orother suitable material, and firmly fastened to the wood, and sets offat the edges, as seen at h h, forming a spring, which, combined with itspliability, causes it to fit closely to the stone or block when firmlypressed downward. The india-rubber prevents the strip from being movedeasily, and prevents the mingling of the colors while the stone orblocks are being formed with their edges in actual contact.

Fig. 5 represents a straightedge, made of any suitable material, with anotch cut out of its under edge at one end, corresponding to thethickness of the parting-strips, Fig. 4, and is used by resting thenotched end upon the strip D, and the other end upon the forming-frameO, as shown at E in Fig. 6, and sweeping the stone forming to the samelevel as the former series.

Fig. 3 shows a detached block, with its edges beveled, so that thedistance is greater across its upper side than across its under side inone direction, and less across its upper side than across its under sidein the other or opposite direction, and when placed in the pavement,with the edges of the different series in contact, the'bevel of itsedges serves to hold each block upon a common plane.

Fig. 6 represents the process of laying my cement pavement by formingthe blocks in place.

The border B and blocks 1, 2, 3, and 4 having been previously laid, theforming-frame O is placed with its corners c firmly against the cornersof the blocks 2 and 3. The pieces D are then placed upon the blocks 1,2, 3, and 4, with their edges even with the edges of the blocks, and thespace between the frame 0 and blocks 1, 2, 3, and at is filled with thedesired material, and pressed firmly against the frame 0 and blocks 1,2, 3, and 4, and the tops of the forming blocks are swept to the desiredlevel with the straight-edge E.

Fig. 7 represents the blocks 5, 6, and 7 finished, and the forming-frameG reversed, preparatory to forming the blocks 8, 9, 10, and 11. Theframe 0 may be reversed in this manner for any number of series ofblocks.

The dotted lines It upon block 6 in Fig. 7 show the block made in place,with the bevel upon its edges.

I claim as my invention- 1. The forming frame, when made with -h, asdescribed.

3. The block or stone, formed substantially as described, with itsopposite edges beveled in opposite directions, for the purposespecifled.

J. BURRELL HURLBUT.

Witnesses:

D. N. HURLBUT, A. D. SAWTELLE.

